Gin-pole.



G. E. KOTHE.

GIN POLE.

APPLICATION FyxLED AUGAI, 1915.

Patented May 9, 1916.

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GEORGE E. Komrij or LANCASTEMMINNESOTA.

GIN-POLE.

LSpeciieationef Letters Patent.

Patented May 9, i916;

Application led August 17, 1915. Serial No. 45,947. v

an adjustable boom from which to suspend a hoisting load line, such as are employed in construction work and `particularly in handling and placing structural steel pieces in position. j j

The purpose of theinvention isto produce an improved forni of gin pole, with suitable attached. parts and adjustable sup* porting lines, which ,may be employed to ad* u vantage in the assembling and construction of towers, buildings, bridges, Sac., of various kinds and heights, and particularly to provide a novel form of pole whereby little or no structure will be required for the building of a tower, thus materially lessening the expense of structural workof this sort, and further to design the `pole soy that it may be used from the 'ground up and maybe used over and over again in the building yof notk only one, but many towers and which may be raised fromr time to time yand repositioned as the work advances, and `finally to pro-l vide a pole which can `be shifted asy sup#y gested with comparatively littletrouble and loss of time. f l

With these and other4 objects in view the invention resides and consists in the construction and novel Vcombination and arrangement of parts hereinafterv more fully described, illustrated in the4 accompanying drawings, and ,pointedoutf in the claims hereto appended, it beingunderstood that various changesr in the form,- proportion, size and minor'details of construction within the scope of they claimsniay be resorted to without departure from the spirit or sacriiicing any of the advantages oi the invention. u t f a Similar characters of reference denote like or corresponding parts throughoutltheseveral gures of lthe accompanying/drawings forming apart of this specification, andV upon which, y v Y Figure l shows a side view of my improved formpoi1 gin pole suspended ,as in operation in four legged steel', structure,l

or tower, in the course of construction. Fig. 2 is an enlarged, broken, longitudinal section of the gin pole illustrated in F ig. l. Fig. y3 shows a cross section taken on line 3-3 of F ig. 2 and F ig. l illustrates a similark cross section of a tower having three yes kfor the attachment of the supporting mes.

,In the" drawing l havepreferablyshown my gin pole applied to a Yfour legged struc ture, yithowever, is equally applicable for use in the construction of a three legged tower, or one having a greater number of columns. It will also be obvious thaty itis usefulon towers of any height and can be used from the ground up, in the building of the whole of the tower, and in which case it obviously has to be shifted to higher ele# vations, from time to time, vas the height ofthe tower increases. j

Referring to Fig. l whereinl have shown a part of a steel structure it will be ,noted thatthe legs 6 of which there are four, are

formed of a series of vertically ydisposed columns V,7 the abutting ends of whichare secured together to form a continuous leg. These columns areVY placed end to end one on top of the other andthe ends are secured `together by plates and angles which are riveted inthe usual way. Y The cross pieces or `struts 8 are ,alsonsually connected at the soAv points of connection yoi' the 4column sections.

Suitable tie rodsllareA also disposed in an gular directions from one corner or intersectionk of the bents and columns of thevone side to that of the other. `The particular design of the tower, however, is notessential to the, application or use or' my improved form oii gin pole ksince it-can be used upony a towerl built on theseV same general lines whether itbev ai three, four or more leg structure. The columns, cross girders, tie rods, &c are usually designed and arranged so as to leave the inside Vof the tower free or openV which l structure materially lends, itself to the use of my pole and the hoisting of materials up through the inside `of the structure. j

l0 represents the poleVY proper which as will ybe'noted is preferablyv formed hollow and'of metaltiny suitable lengths according to thejclass `of Ywork upon 'whichit is to be used. The upper end of thepole as shown is covered with a cap .ll that is secured in position byya bolt 12. A swivel plate 13 iio ripheral surface of the swivel plate to re-` ceive the hooks 16 upon'the pulley blocks 17 of which there may be three or more. Each of these pulley blocks 'is provided with an adjustable line 18 of suitable length. The outer endportions of the lines are also provided with pulley blocks 19 that are adapted to be secured as by a. tie line 20 to the columns, bents or other portions of the steel structure. An eye 2l is also formed integral with the cap secured to the upper end of the pole and like the eyes on theswivel plate serves to support the hook 22 of the pulley Yso block 23. This pulley block serves to accommodate the load line 24 carrying the suspended pulley block 25 and to which the various pieces of' the structure are attached from time to time when the same are to be hoisted.

To the lower end of the pole is secureda shoe 26 having a central hole 27 through its lower end portion. This shoe also includes an Yannular flange 28 having an annular groove 29 formed on its underv side. A basket 30 surrounds the shoe and like it includes a central hole 3l which alines with the hole in the shoe. An annular ange 32 is also formed around the upper end portion of the basket and upon its top face is provided a groove 33y which registers with the groove in the shoe and serves to accom-y modate a series of balls 34 thus forming a` ball bearing between the two partsV and whereby the pole is free to turn within the basket. Y The basket like the swivel plate on the upperend ofthe pole is provided with a series of three or more eyes 35V throughwhich the hooks of thev pulley block 36 pass. Adjustable guidelines 37 are secured to' these blocks and are in Vturn Vthreaded through-the upper blocks 38 which like the blocks 19 lattached tothe upper guide lines are secured to the structure; Y Y

i A suitable opening 39 is formed in the side of the lower end ofthe pole and adjacent to it is mounted rollers 40 over which the adjustableend of the load line 24 to be drawn down along the outside of and out through the holes of the shoe and `basket thus serving in a measure to counterbalance the weight of the load carried by the load line and incidentally bringing the adjustable end of the load line down central through the structure where it is less liable to interfere with the hoisting ofthe steel.V

In Fig. l myimproved gin pole is shown attached to the top ofl a finished section so to speak. The eight adjustable tie rods being connected to the corners or intersectiony of the bents and columns. The pole is shown slightly tilted as in a Yworkingposition and f inthe act of supporting a column which is being hoisted to. bev placed upon and form a continuation of one of 'the legsk shown at thea-ight. The pole can obviously be adjusted so as to be tilted in any direction by simply loosening up on some of the guide lines andtightening on others. In Vthis re-V spect it willbe noticed that the blocks of each of the upper lines and the corresponding lowerv `guy klines are arranged close together and secured at substantially the same point or corner of the structure, thus fixing the point of suspension of the lower lines in n alinement with the point of connection Yof Y the upper guy lines.

In practice as the formation of the structure proceeds. and when a Vsection is completed including the placing of the 4cross Vgirders which connect the upper end ofthe n columns,'the guide lines are thenfshifted one by one from the lower position shown` in Fig. l. and attached to the upperend of the columns in substantially the same manner that they are shown secured below, and in Vthis manner the pole is gradually raised' so that itsupper end willv extend abovethe structure sufficiently high so that a column can be raised high enough to permit its lower end being placed in position upon the more vsupporting lines attached toeach of said supporting plates. j n.

' 3. A gin pole of the class described, the same including a vertically disposed rotatable pole', supporting means in which the poles are mounted to turn, and three or more lines attached to said supporting means.

y4. A gin pole of the class described, the same including a hollow pole, having an opening through its lower end, three or more adjustable supporting linesV attached to each end, anda load line connected with the top end of the pole and threaded through; the hole in the lower end. j *Y 5. A gin pole adapted to be suspended from' a' steel structure, including a pole, supporting'members in which the two ends of the pole are swiveled, and three vor more' adjustable supporting lines attached to each of said supporting members.

6. A .gin pole of the class described,vthe same including a pole, a basket in whichV it rests, three or ymore lines attached to the basket and three or more lines for supporting the opposite end of the pole.

7. A gin pole of the class described, the same including a pole, a basket in which the pole rests, a series of lines for supporting the basket, a swivel attached to the top end of the pole, and three or more adjustable supporting lines attached to the swivel.

8. A gin pole of the class described including a vertically disposed pole adapted for movement rotatably, tWo series of supporting lines the ends of one series being attached to one end of the pole and the end of the other series being attached to the other end, the outer endsof both series being fasf tened ata point substantially opposite the sides of the pole and a load line carried by the pole.

Signedat Bridgeport, in the county of Fairfield and State of Connecticut this 14th day of Aug., A. D., 1915.

GEORGE E; KOTHE.

Witnesses:

C. M. NEWMAN, R. S. SWAIN.

Copies'ot this patent may 'be obtained for ive cents each, by addressing the Commissioner of Patents, Washington, D. c. 

